Liquid crystal display

Abstract

Unwanted creation of an after-image in display images is significantly suppressing. A liquid crystal compound having either an ester structure or a heterocyclic structure with more than one oxygen atom is added to liquid crystal material at a mixture ratio of more than ten percent (10%).

What is claimed is:  
     
         1 . A liquid crystal display device comprising a liquid crystal compound having more than one unshared electron pair, contained in a liquid crystal material.  
     
     
         2 . A liquid crystal display device comprising a liquid crystal compound having an ester structure, contained in a liquid crystal material.  
     
     
         3 . A liquid crystal display device comprising a liquid crystal compound having a heterocyclic structure with more than one oxygen atom, contained in a liquid crystal material.  
     
     
         4 . A liquid crystal display device comprising a liquid crystal compound having one of an ester structure and a heterocyclic structure with more than one oxygen atom, added to a liquid crystal material at a ratio of 10% or greater.  
     
     
         5 . The liquid crystal display device according to  claim 4 , wherein a liquid crystal compound having one of an ester structure and a heterocyclic structure with more than one oxygen atom is added to the liquid crystal material at a ratio of 30% or less.  
     
     
         6 . A liquid crystal display device comprising a liquid crystal material having an n conductivity type as a result of addition of a liquid crystal compound thereto at a ratio of 10% or more, the liquid crystal compound having one of an ester structure and a heterocyclic structure with more than one oxygen atom.  
     
     
         7 . A liquid crystal display device comprising a liquid crystal compound having one of an ester structure and a heterocyclic structure with more than one oxygen atom, added to a liquid crystal material at a ratio of 30% or less.  
     
     
         8 . The liquid crystal display device according to any one of the preceding  claims 1  to  7 , wherein: 
 a pixel electrode and a counter electrode are formed with a dielectric film laid therebetween in a liquid crystal side pixel region of one substrate of those substrates as disposed to oppose each other with a liquid crystal material interposed therebetween; and  
 one electrode of these pixel electrode and counter electrode is comprised of a transparent electrode as formed entirely in the pixel region, whereas a remaining electrode thereof is extended in one direction and parallel-provided in a direction at right angles to said direction.  
 
     
     
         9 . The liquid crystal display device according to any one of the preceding  claims 1  to  7 , wherein: 
 a pixel electrode and a counter electrode are formed with a dielectric film laid therebetween in a liquid crystal side pixel region of one substrate of those substrates as disposed to oppose each other with a liquid crystal material interposed therebetween; and  
 these pixel electrode and counter electrode comprise a plurality of electrodes extending in one direction and being parallel-provided in a direction at right angles to said direction, and they are disposed alternately.  
 
     
     
         10 . The liquid crystal display device according to any one of the preceding claims  8  and  9 , wherein: 
 a switching element as driven by supplement of a scan signal from a gate signal line is further provided; and  
 an image signal from a drain signal line is supplied via this switching element to the pixel electrode.